code: def cat_results(out_files, tmp_dirs):
      for o_f, t_d in zip(out_files, tmp_dirs):
          if o_f is None or t_d is None:
              if o_f is not None or t_d is not None:
                  warnings.warn(
                      f"Output file and tmp directory are expected to be `None` simultaneously whereas tmp directory "
                      f"is {t_d} and output file is {o_f}."
                  )
          else:
              _cat_results(o_f, t_d)
  
file_path: NeMo/scripts/neural_machine_translation/length_ratio_filter.py
imports: import argparse
  import logging
  import multiprocessing
  import re
  import shutil
  import warnings
  from pathlib import Path
  from time import sleep
  from tqdm import tqdm
label_desc: Use image node_id 7 for calling a global function with example usage: cat_results(out_files, tmp_dirs) without return types